Seiko Cal. 6643 - 578

Seiko 6643-578

The 6643-578 is a sought-after Solar piece from Seiko's golden era. Powered by the 6643 caliber with 33j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-989d60f3f19f]

Also known as: Goldfeather

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
41mm
Case Thickness
10.3mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
White
Jewels
33j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1981

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